JPWO2023135630A5

JPWO2023135630A5 -

Info

Publication number: JPWO2023135630A5
Application number: JP2023573504A
Authority: JP
Filing date: 2022-01-11
Publication date: 2024-05-13

Description

本開示に係る空気調和装置は、対象空間の空気と冷媒とを熱交換させる第１負荷側熱交換器、及び第１負荷側熱交換器に流入する冷媒、又は第１負荷側熱交換器から流出した冷媒を膨張させる第１負荷側膨張弁を有する第１熱負荷機器と、対象空間の空気と冷媒とを熱交換させる第２負荷側熱交換器、及び第２負荷側熱交換器に流入する冷媒、又は第２負荷側熱交換器から流出した冷媒を膨張させる第２負荷側膨張弁を有する第２熱負荷機器と、冷媒を圧縮する圧縮機を有し、第１負荷側熱交換器及び第２負荷側熱交換器に冷媒を供給する熱源機と、内部に冷媒が流れ、熱源機に対して、第１熱負荷機器と第２熱負荷機器とを並列に接続する冷媒配管と、冷媒配管に設けられ、第１熱負荷機器に流入する冷媒、又は第１熱負荷機器から流出する冷媒の量を調整する電磁弁と、制御装置と、を備え、制御装置は、第２熱負荷機器における冷媒の漏洩が検知されていないときに、第１熱負荷機器における冷媒の漏洩を検知すると、第１負荷側膨張弁及び第１熱負荷機器に接続された冷媒配管に設けられた電磁弁を閉止して第１熱負荷機器における冷媒の流通を遮断し、第１負荷側膨張弁を閉止し始めると共に、第２負荷側膨張弁の開度を拡大し始める。 The air conditioning apparatus according to the present disclosure includes a first heat load device having a first load side heat exchanger that exchanges heat between the air in a target space and a refrigerant, and a first load side expansion valve that expands the refrigerant flowing into the first load side heat exchanger or the refrigerant flowing out from the first load side heat exchanger, a second load side heat exchanger that exchanges heat between the air in the target space and the refrigerant, and a second heat load device having a second load side expansion valve that expands the refrigerant flowing into the second load side heat exchanger or the refrigerant flowing out from the second load side heat exchanger, a heat source unit having a compressor that compresses the refrigerant and supplies refrigerant to the first load side heat exchanger and the second load side heat exchanger, and a heat source unit having a refrigerant flowing therein and a heat source unit having a compressor that compresses the refrigerant and supplies refrigerant to the first load side heat exchanger and the second load side heat exchanger. The machine is equipped with a refrigerant piping that connects a first heat load equipment and a second heat load equipment in parallel, a solenoid valve provided in the refrigerant piping that adjusts the amount of refrigerant flowing into or out of the first heat load equipment, and a control device, and when the control device detects refrigerant leakage in the first heat load equipment when refrigerant leakage in the second heat load equipment is not detected, it closes the first load side expansion valve and the solenoid valve provided in the refrigerant piping connected to the first heat load equipment to block the flow of refrigerant in the first heat load equipment , begins to close the first load side expansion valve, and begins to increase the opening of the second load side expansion valve.

Claims

a first heat load device including a first load side heat exchanger that exchanges heat between the air in a target space and a refrigerant, and a first load side expansion valve that expands the refrigerant that flows into the first load side heat exchanger or the refrigerant that flows out of the first load side heat exchanger;
a second heat load device including a second load side heat exchanger that exchanges heat between the air in the target space and a refrigerant, and a second load side expansion valve that expands the refrigerant flowing into the second load side heat exchanger or the refrigerant flowing out from the second load side heat exchanger;
A heat source unit having a compressor that compresses a refrigerant and supplies a refrigerant to the first load side heat exchanger and the second load side heat exchanger;
a refrigerant pipe through which a refrigerant flows and which connects the first heat load device and the second heat load device in parallel to the heat source device;
an electromagnetic valve provided in the refrigerant piping to adjust an amount of refrigerant flowing into the first heat load device or flowing out from the first heat load device;
A control device,
The control device includes:
When refrigerant leakage in the first heat load device is detected while refrigerant leakage in the second heat load device is not detected, the solenoid valve provided in the first load side expansion valve and the refrigerant piping connected to the first heat load device is closed to block the flow of refrigerant in the first heat load device , the first load side expansion valve begins to be closed, and the opening degree of the second load side expansion valve begins to be increased.
Air conditioning equipment.

The heat source machine is
A heat source side expansion valve is provided to expand the refrigerant.
The control device includes:
The air-conditioning apparatus according to claim 1 , wherein, when a refrigerant leak is detected in the first heat load device or the second heat load device, the opening degree of the heat source side expansion valve is reduced from a current opening degree.

The heat source machine is
a refrigerant heat exchanger for exchanging heat between the refrigerant and air;
A fan for blowing air to the refrigerant heat exchanger,
The control device includes:
The air-conditioning apparatus according to claim 1 or 2, wherein when a refrigerant leak is detected in the first heat load device or the second heat load device, the air volume of the fan is reduced below a current air volume.

Further comprising a heat medium heat exchanger for exchanging heat between the heat medium and air,
The heat source machine is
The air-conditioning apparatus according to claim 1 or 2, further comprising a refrigerant-heat medium heat exchanger that performs heat exchange between the refrigerant and the heat medium that has been heat exchanged in the heat medium heat exchanger.

The heat source machine is
a bypass pipe connecting the suction side and the discharge side of the compressor;
a bypass valve provided in the bypass piping to adjust the amount of refrigerant flowing through the bypass piping,
The control device includes:
The air-conditioning apparatus according to any one of claims 1 to 4, wherein when a refrigerant leak is detected in the first heat load device or the second heat load device, a bypass valve is opened.

The control device includes:
The air conditioning apparatus according to any one of claims 1 to 5, wherein when a refrigerant leak is detected in the first heat load device or the second heat load device, an operating frequency of the compressor is reduced below a current operating frequency.